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you need a reliable flame rollout switch that integrates seamlessly with existing safety circuits
High-Temperature Durability: Robust insulation protects against the extreme thermal cycles common in burner housings
clogged return air filters
ensuring reliable signal switching in demanding environments like York fan coil units and air handlers
it is constructed from corrosion-resistant brass to withstand non-potable water applications
York S1-024-21678-700 Relay you need a reliable flameThe York S1 024 21678 700 is an OEM 24V SPDT Relay designed for heavy duty switching in residential and commercial HVAC control systems. This component serves as the direct 024 21678 000 replacement, ensuring seamless integration into existing control boards without requiring circuit modifications. Engineered with a 24VAC 50 60Hz coil, this Single Pole Double Throw relay provides the necessary electrical isolation between low voltage thermostat